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just as it has since cave walls

Hi!
What is the exact meaning of the phrases printed in bold? It is from a book about mobile pedagogy, but I think some words of it might be omitted.

The hardware (tablets, etc.), software (apps and the like), and pedagogy (mobile or online) and innovations just now evolving like artificial intelligence or virtualization, will continue to transform the educational opportunities just as it has since cave walls were the medium of choice for the publication of information.

Re: just as it has since cave walls

We have painted pictures on cave walls, moved on to paper, then came printing and now we use computers- technologies have changed over the years but we're still transmitting knowledge, just in different ways.